Unusual nuclei, with spindle-like tubular projections, in the placental tissue of Utricularia nelumbifolia may be involved in nucleus-to-cell-to-cell communication.
Rice (Oryza sativa) leaf blades possess lobed mesophyll cells with intricate cell boundaries. Their sub-cellular structure has been observed with transmission electron microscopy (TEM) of thin sections, but the whole...
Stomata in the moss Funaria are regularly spaced at the base of the capsule. Merced and Renzaglia describe the patterning and distribution of stomata and how they are coordinated with the formation of substomatal...
An examination of an embryo in an underground gametophyte reveals a massive foot with ultrastructural variability comparable to that across major clades.
Recent molecular approaches have resulted in the re-circumscription of Gomesa and Oncidium (Orchidaceae; Oncidiinae), together with their respective clades. Stpiczyńska et al. compare the anatomical organization of the...
Phenotypic variability is a successful strategy in lichens for colonizing different habitats. Pérez-Ortega et al. study the extreme phenotypic modifications shown by vagrant populations of the cosmopolitan shrubby...
Foliar variegation is often assumed to be due to lack of chlorophyll or the presence of special pigments in sections of a leaf, but it can also result from leaf structural variation. Sheue et al. show that naturally...
The three earliest extant lineages of flowering plants are represented by only some 16 genera. Despite low species’ diversity, these genera are highly diverse in their morphology, so inferring ancestral features in...